TWRP Backups: Not restoring? - Samsung Galaxy S5 Neo Questions & Answers

Hi everyone,
I've been using the official LineageOS 17.1 (SM-G903F) and when I try to backup and restore a ROM from TWRP LineageOS just gets stuck in the load screen (or in some cases the Galaxy S5 Neo Boot Screen loops)
I've so far tried TWRP Versions:
3.5.0_9-0
3.4.0-0
2.8.7.0 (can not create backup)
LastStandingDroid's Unofficial Experimental TWRP (2.8.7.0)
Any ideas on what the problem could be? Are you guys able to recover TWRP backups?
I've also tried not using GApps.
Thanks for any help,
Aventurer

I guess /system cannot be restored. /data and /boot seem to restore fine, but I need to flash the LineageOS .zip along with it.
Any ideas on why? Is it a TWRP problem? I'm not using read-only mode in TWRP and I get no errors, it just bootloops.

I'd like to know the answer to this as well.
I'm experiencing the same issue with LOS 17.1/twrp 3.4

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I was previously on OOS 2.2.1 and TWRP 3.0.0-2 (phone encrypted) and it was able to decrypt the /data partition just fine.
I decided to update to OOS 3.0 Beta with the modified H2-MM TWRP 3.0.0-1. I did this by dirty flashing. My phone boots up fine and I'm able to unlock the phone and everything seems to be running fine. The problem is now H2-MM TWRP 3.0.0-1 is unable to decrypt my /data partition. It keeps asking for my password, saying it's the wrong password. I know the password is correct because I'm able to get into my phone just fine. Would like to be able to access TWRP to flash su among other things.
Is anyone else having this issue? Anyone have OOS 3.0 Beta with H2-MM TWRP that CAN decrypt?
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Thanks in advance!
Same problem here, I hope a solution comes soon..

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Hi folks,
I need some help. I have had my X820 I ordered from bangood for about a month now. I have tried a variety of ROMs on this device, and twrp-3.2.1-0-x2.img. This morning I tried to give the latest lineageOS a try. I did the typical wipes, and flashed lineageOS & gapps. After reboot google play started to throw all types of errors.
I booted back into TWRP, and this time it would only mount in read only. I tried the trick to change the /data partition fron ext2 back to ext4, did wipes again, installed ROM + Gapp, reboot but still have crashing playstore and google background processes.
I went from an already installed AICP to LOS. I did do a complete TWRP backup of AICP beforehand. The weird thing is that if I do a complete wipe again from TWRP, and do a fresh install of Pixel Experience [AOSP] all works normally. And after I did another wipe from TWRP after Pixel Experience, and restored my AICP backup all is working fine now both in TWRP & AICP. Has anyone had something simular happen like this before?
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Would appriciate any insight on this, I've tried so many roms now with f2fs as well as fde file systems, both encrypted and unencrypted and none of the nandroid backups I make using the latest TWRP or TWRP-FBE depending have worked at all. I am able to make the backup and restore it, no errors but it will never boot up, always either boot loop or stuck on Google logo screen.
Now I just can't seem to find what I'm doing wrong with this phone, I've formatted and reinstalled a bunch of times with latest Magisk root, last two roms I tried with android 9 was RR 7.2 and AICP weeklies, and before that the stock 8.1 from google none of which could be restored from nandroid backup. On my other phones I have TWRP backup/restore function working no problem, so I know how to use the UI with sucess.
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